Drier



July 18, 1933. F. L.. FURBUSH DRIER Filed March 14, 1932 m O`OO muOOOOOOOOOO O O NNMuooooooo III/l Patented July 18, 1933 UNITED STATESlPATENT ori-1c FRANK L. FURBUSH, OF GRANITEVILLE, MASSACUSETTS, ASSIGNORT0 C. G. SAR- GENTS SONS CORPORATION, OF GRANITEVILLE, MASSACHUSETTS, ACORPORATION OF MASSACHUSETTS DRIEB Application led March V14, 1932.Serial No. 598,776.

This invention relates to a drying machine for drying purposes ingeneral but it is Darticularly applicable to a machine for dryingfibrous material such as wool.

The principal object of the invention is to provide improved means fordirecting fresh air from the outside to a proper point to cool the stockand prevent the hot air in the machine from going out into the room and.also to provide for proper regulation of the air so that fresh air canbe admitted at another point if found necessary to reduce the pressureof the air on the stock on the conveyor or apron which carries itthrough the machine. v

Other objects and advantages of the invention will appear hereinafter.

Reference is to be had to the accompanying drawing, in which Fig. l is alongitudinal sectional view through the whole length of a drierconstructed in accordance With this invention, and

F ig. 2-is a sectional View on the line 2-2 The invention is shown asapplied to a drier of Well-known type in which the material is fed froma bin 10 by means of an au-,

tomatic feeder 11 therein and deposited on the main conveyor or apron 12in the drier. This latter apron conveys the material in a loosecondition through the drier to the doffer end where it passes over acylinder or drum 13 which also supports that end of the endlessconveyor. Above the longworkingstrand of the conveyor 12 are locatedsteam-heating pipes 14 in a compartment of the usual character. Belowthe conveying strand of the apron 12 but at one side are located fans 15as usual which are designed to draw in tb fresh air at` the doffer endof the drier and force it upwardly over a partition 16 and thendownwardly through the pipes 14 and through the brous material on thetop strand of. the apron 12. The air for this purpose comes in at thedofl'er end as stated.

It isa well-known expedient to let the air in at the dofer end over thematerial on the apron 12 and through a partition 17 which is providedwith an opening having a damper coming in over the material blow outinto the room through the opening I in the partition 17. Furthermore,the air on the conveyor at the doli'er end may be drawn in so rapidly bythe series of fans 15 located along the side of the drier as to pressthe stock down on the conveyor and not allow-enough air to go downthrough it.

By this invention, an additional partition 20 is employed spaced fromthe partition 17 and close to the dofer end of the machine. Thispartition extends all the way from the bottom of the drier to a pointjust under the upper strand of the apron having of course anopeningthrough it for the lower strand and apron. It is provided with anopening through it and a damper 21 which can be opened more or less orclosed entirely according to the circumstances by means of a shaft 22and hand wheel 23;

It will be seen that by this arrangement a compartment 24 between thepartitions 17 and 20 is provided which is substantially enclosed. Nowthe air coming in through the stock on the conveyor at the top of thiscompartment in the old way can be regulated by means of the damper 21.If the pressure of the air is too great on the stock on the apron abovethe compartment 24, the damper 21 can be opened as much as may bedesired to allow air to enter at that point and reduce the pressure ofthe air from above on the stock. At all times a considerable body of airwill be drawn in through the stock from above to cool it. Thisconstruction also prevents the h ot air in the machine from blowing outinto the room and thus reduces the expense of operation.

This furnishes a very simple and inexpensive construction foraccomplishing these objects. It increases the eHiciency of the drier andenables the current of air pressing on the stock at the dofer end to beregulated whenever necessary to secure the proper cool` ing of the stockby this air before the stock is discharged from the machine.

Although I have illustrated and described only one form of theinvention, I am aware of the fact that modifications can be made thereinby any person skilled in the art without departing from the scope of theinvention as expressed in the claims. Therefore, I do not Wish to belimited to al1 the details of construction herein 'shown and described,but what I do claim is 1. In a drier, the combination withl a casing, anapron therein'for passing the stock through the drier, means for heatingthe drier, fans for drawing in the air from outside, a partition in thecasing having a damper located at a distance from the doier end foradmitting the air to the fans, means for admitting air to the drierthrough the stock at the doler end, and a second partition nearer thedoi'er end than the first one having a damper for regulating thepressure of air on the top of the stock.

2. In a drier, the combination with a casing, an apron therein forconveying the stock through the drier, of tWo partitions near the vdoferend of the casing separated from each other, each having an openingprovided with a damper and the drier having an opening above the stockat the doffer end, whereby the damper in the partition nearest the endcan be used to regulate the amount of air which is admitted from abovethe stock and its pressure on the stock.

FRANK L. FURBUSH.

